CN113217099B - Hydraulic directional top plate cutting device - Google Patents
Hydraulic directional top plate cutting device Download PDFInfo
- Publication number
- CN113217099B CN113217099B CN202110639422.3A CN202110639422A CN113217099B CN 113217099 B CN113217099 B CN 113217099B CN 202110639422 A CN202110639422 A CN 202110639422A CN 113217099 B CN113217099 B CN 113217099B
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- sleeve
- joint
- nozzle
- hydraulic directional
- cutting apparatus
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- 238000005520 cutting process Methods 0.000 title claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 238000011144 upstream manufacturing Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims description 4
- 239000002360 explosive Substances 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 239000003245 coal Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 239000011435 rock Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005422 blasting Methods 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
Abstract
The application provides a directional roof cutting device of water conservancy, it includes that liquid pipe, intercommunication set up connect and the intercommunication setting of the downstream end of liquid pipe are in nozzle on the joint, wherein, the external high-pressure liquid source is connected to the liquid pipe, and transport high-pressure liquid to connect for high-pressure liquid follows the directional blowout of nozzle, this directional roof cutting device of water conservancy adopts water conservancy to carry out directional cutting roof, and it has avoided using the high explosive and has used a series of problems that the high explosive brought, has the pertinence height, environmental pollution advantage such as little.
Description
Technical Field
The invention belongs to the technical field of coal mine safety production, and particularly relates to a hydraulic directional roof cutting device.
Background
Coal is the main energy source in China, so that the safe and efficient mining of mines is particularly important. There are a number of factors that affect the normal production of coal mines, such as gas, water, fire, etc. Among these factors, the problem of strong mine pressure from hard roofs is quite pronounced. Along with the continuous pushing of the underground coal face of the coal mine, the length and the suspended roof area of the top plate left over by the goaf are larger and larger, the strength for supporting the top plate and the coal column of the goaf is smaller and smaller, stress concentration is easy to form, and accidents of roof collapse injury and mine pressure impact are easy to occur for a long time.
In the production process, the top plate which is not reserved is cut in advance, so that the top plate is required to collapse artificially, and accidents such as top plate falling and gas overrun are prevented. Generally, when the goaf roof is relatively low in strength, the roof collapses under the action of ground stress and gravity, and when the roof is relatively hard, the roof is usually subjected to fracturing by adopting a traditional deep hole blasting method and the like.
However, the conventional fracturing method has certain defects, such as that a large amount of high explosive is required for deep hole blasting, the stress wave in the blasting process generates strong stress disturbance on the original rock, the stress distribution of the original rock is changed, and rock burst accidents are easily induced. And a large amount of smoke is generated when the explosive explodes, so that the underground environment is polluted. In addition, the goaf under the coal mine is easy to accumulate gas, and the gas explosion is easy to be induced by adopting an explosive blasting and fracturing mode.
Therefore, aiming at the problems, a novel safe roof cutting roof caving device is needed for the coal mine, and the safe, reliable and efficient roof cracking can be realized on the premise of ensuring the safety.
Disclosure of Invention
Aiming at part or all of the technical problems in the prior art, the invention provides a hydraulic directional roof cutting device. The hydraulic directional roof cutting device adopts hydraulic to cut the roof directionally, avoids a series of problems caused by using high explosive and using high explosive, and has the advantages of high pertinence, less environmental pollution and the like.
According to the present invention, there is provided a hydraulic directional roof cutting apparatus comprising:
the liquid pipe is provided with a liquid inlet pipe,
a joint arranged at the downstream end of the liquid pipe in a communicating way,
a nozzle arranged on the joint in a communicating way,
the liquid pipe is connected with an external high-pressure liquid source and conveys high-pressure liquid to the joint, so that the high-pressure liquid is sprayed out of the nozzle in a directional mode.
In one embodiment, the joint has a reducing section and a straight section provided downstream of the reducing section, and the flow area of the reducing section is gradually reduced in the direction from upstream to downstream, and the nozzle is provided on the straight section.
In one embodiment, a guide tube is provided on the straight barrel section for communicating the straight barrel section with the nozzle.
In one embodiment, a plurality of said guide tubes are arranged at intervals in the axial direction, and wherein at least two of said guide tubes are arranged obliquely with respect to the radial direction, said guide tubes being arranged obliquely away from each other from the upstream end to the downstream end.
In one embodiment, the liquid pipe further comprises a sleeve sleeved on the outer side of the liquid pipe.
In one embodiment, a connection for at least partially surrounding the liquid tube is optionally provided at the upstream end of the sleeve.
In one embodiment, the sleeve extends around the nipple downstream end and is closed at the end, and a communication hole is provided in a side wall of the sleeve for correspondence with the nozzle.
In one embodiment, the closed end of the sleeve is fixedly connected with the joint, and a clamping piece for limiting the circumferential position is arranged between the closed end of the sleeve and the joint.
In one embodiment, the device further comprises a receiving basin sleeved on the sleeve, and the opening of the receiving basin faces to the downstream end.
In one embodiment, the receiving tub has a first cylindrical member surrounding the sleeve and a second bowl sleeved outside the first cylindrical member, the first cylindrical member and the second bowl forming an annular receiving groove.
Compared with the prior art, the invention has the advantages that: the hydraulic directional roof cutting device adopts hydraulic force to cut the roof, avoids a series of problems caused by using high explosive and using high explosive, and has the advantages of high pertinence, less environmental pollution and the like. Simultaneously, this cutting device can be in the cutting in-process orientation easily for roof stratum produces the crack and expands, reduces the integrality of roof, makes it lose the characteristic of transmission power, and the roof caving effect is good.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 shows a cross-sectional view of a hydraulic directional roof cutting apparatus according to one embodiment of the invention;
FIG. 2 shows a layout of guide tubes and nozzles of a hydraulic directional roof cutting device according to one embodiment of the invention;
FIG. 3 shows a receiving basin of a hydraulic directional roof cutting device according to one embodiment of the invention;
fig. 4 is a section A-A from fig. 1.
In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.
Detailed Description
In order to make the technical solution and advantages of the present invention more apparent, exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some of the embodiments of the present invention and are not exhaustive of all embodiments. And embodiments of the invention and features of the embodiments may be combined with each other without conflict.
The embodiment of the invention provides a hydraulic directional roof cutting device. As shown in fig. 1, the hydraulic directional roof cutting device comprises a liquid pipe 1, a joint 2 and a nozzle 3. The liquid pipe 1 is used for communicating with an external high-pressure liquid source (it should be noted that, for example, the working pressure of the high-pressure liquid source may be 5-20Mpa, but the specific pressure may be adaptively selected according to the actual working, and the liquid may be water). The joint 2 is arranged at the downstream end of the liquid pipe 1 in a communicating manner and is used for receiving high-pressure liquid. A nozzle 3 is provided in communication with the sub 2 for directing the high pressure fluid out to form a fracture in the formation.
In the use, liquid pipe 1 connects external high-pressure liquid source to transport high-pressure liquid to connect 2, make the directional blowout of high-pressure liquid follow nozzle 3, thereby form artifical crack in the stratum of roof, reduce the integrality of roof, make it lose the characteristic of transmission power, the treatment effect is good, and then help the operation of blowing off. The cutting device adopts high-pressure water power, avoids a series of problems caused by using high explosive, and has the advantages of high pertinence, less environmental pollution and the like. Meanwhile, the cutting device can conveniently adjust the pressure and the spraying direction of water so as to adjust the size of cracks, the spraying direction and the like, and has the advantages of high operation controllability and the like.
In one embodiment, the joint 2 has a reducing section 21 and a straight section 22 disposed downstream of the reducing section 21. The flow area of the variable diameter section 21 becomes gradually smaller in the upstream to downstream direction. The nozzle 3 is arranged on the straight barrel section 22. For example, the joint 2 and the liquid pipe 1 may be screw-coupled. Providing the adapter 2 with a variable diameter section 21 facilitates the connection while reducing the outer diameter of the straight section 22, facilitating the connection of the nozzle 3. In addition, the variable diameter section 21 of this structure can better guide the flow of the high pressure liquid and increase the flow rate of the high pressure liquid.
As shown in fig. 2, a guide tube 4 is provided in the straight tube section 22. The guide tube 4 serves to communicate the straight barrel section 22 with the nozzle 3. In the axial direction of the straight tube section 22, a plurality of guide tubes 4, for example two, are arranged at intervals. In the circumferential direction of the straight tube section 22, a plurality of guide tubes 4, for example, two guide tubes 4 are provided at intervals, and the two guide tubes 4 are uniformly provided in the circumferential direction. This arrangement can improve the efficiency of the jet and thus the cutting effect.
Preferably, at least two of the guide tubes 4 are disposed obliquely with respect to the radial direction, the two obliquely disposed guide tubes 4 being disposed away from each other from the upstream end to the downstream end. For example, the description is given of having two guide pipes 4 in the axial direction in fig. 1, the free ends of the guide pipes 4 in the upstream section (the ends where the nozzles 3 are located) are inclined toward the upstream end with respect to the fixed end of the present guide pipe 4 (the end connected to the straight tube section 22), and the free ends of the guide pipes 4 in the downstream section are inclined toward the downstream end with respect to the fixed end of the present guide pipe 4, so that the free ends of the two guide pipes 4 are further apart. The arrangement mode can not only radially communicate with the rock stratum, but also axially communicate with the rock stratum to form a larger range of cracks, thereby being beneficial to cutting the top plate. In the process of communicating rock formations in a sectional manner, the arrangement mode can also enable cracks formed on drilling holes in different depth directions to be communicated with each other, so that cutting efficiency is improved.
In one embodiment, the cutting device further comprises a sleeve 5 sleeved on the outside of the liquid tube 1. The sleeve 5 is used for protecting the liquid pipe 1 and is convenient for a user to carry out handheld operation and the like. Preferably, sleeve 5 extends around fitting 2 downstream and forms a seal at the end. A communication hole 51 is provided in the wall of the sleeve 5 for correspondence with the nozzle 3. That is, the sleeve 5 itself is configured in a barrel shape with its opening extending toward the upstream end and being sleeved outside the joint 2 and at least part of the liquid pipe 1. The sleeve 5 also protects the nozzle 3 inside it so that the cutting device moves smoothly when moving in the borehole and avoids the guide tube 4 and the nozzle 3 from being damaged by force.
Preferably, the closed end of the sleeve 5 is fixedly connected to the fitting 2. A catch 7 for defining a circumferential position is provided between the closed end of the sleeve 5 and the fitting 2. By arranging the clamping piece 7, the positions of the sleeve 5 and the joint 2 can be ensured, and the nozzle 3 is ensured to be always in an exposed state. For example, as shown in fig. 4, the clip 7 includes a fixed stage 71 provided on the downstream end surface of the joint 2, the fixed stage 71 being provided in a protruding manner. A blind hole 72 is drilled in the stationary table 71. A notch 73 may be provided in the fixed base 71 in communication with the blind hole 72. At the same time, a protruding stand 74 is provided at the inner end of the sleeve 5, which protruding stand 74 can be inserted into the blind hole 72 described above. Further, engaging teeth 75 are provided at the outer end of the protruding stand 74. The clamping teeth 75 can be clamped at the notch grooves 73. And then the screw 77 sequentially passes through the protruding table 74 and the fixing table 71 for fixedly connecting the sleeve 5 with the joint 2.
The axial length of the sleeve 5 can be adjusted according to actual use, so that the sleeve is convenient for a user to carry out handheld operation. In order to increase the axial length of the cannula 5, a connection 6 for at least partly surrounding the liquid tube 1 may also be optionally provided at the upstream end of the cannula 5. For example, the connector 6 is cylindrical and is fitted on the outside of the liquid tube 1 in advance. The connector 6 may be selectively attached to or detached from the sleeve 5 during use of the cutting device. For example, the connecting piece 6 is in threaded connection with the sleeve 5, or is clamped, for easy disassembly or connection.
The cutting device further comprises a receiving basin 8 sleeved on the sleeve 5. The opening of the receiving tub 8 is directed toward the downstream end. In the working process, the storage basin 8 is mainly used for collecting returned liquid and is mainly beneficial to civilized construction. Preferably, as shown in fig. 3, the receiving tub 8 has a first cylindrical member 81 surrounding the sleeve 5 and a second bowl 82 sleeved outside the first cylindrical member 81. The first cylinder 81 and the second bowl 82 form an annular receiving groove 83 for collecting the returned liquid. For example, the receiving tub 8 may be made of an elastic rubber material. The sealing performance between the accommodating basin 8 and the sleeve 5 is good, the accommodating basin can be well wrapped on the outer wall of the sleeve 5, and the accommodating basin can move in the axial direction of the sleeve 5 according to different injection depths.
Nozzle 3 may be a KMT komet water jet nozzle, for example, manufactured by AccuStream, device model a22600xx.
The method of use of the cutting device is described in detail below with reference to figures 1-4.
Construction is performed in a desired roof-cutting area of a working face of a coal mine tunnel to form a borehole in a roof. The downstream section of the cutting device is then inserted into the deepest part of the borehole. The cutting device is supplied with high pressure water, which is ejected from the nozzles 3 to form cracks at corresponding locations of the rock formation. The cutting device is then retracted along the borehole and a jetting operation is performed at other corresponding locations in the formation. The cutting direction can also be adjusted by adjusting the angle of the cutting device at the same depth position of the drill hole. And the drilling terminal is retracted from the drilling terminal to the shallow part to cut the steel plate section by section until the cutting is completed. In the above process, the connecting member 6 may be increased or decreased at any time. And the position of the storage tub 8 can be adjusted at any time to store the returned water.
Through cutting device, can make roof stratum produce the crack and expand to destroy the integrality of roof stratum above the working face end coal seam, reduce the intensity of roof rock mass, realized the purpose that the upper corner suspended roof of high gas mine working face was stable before adopting, promptly fall after adopting, show reduction stope working face upper corner suspended roof area, effectively prevent that the upper corner gas of working face from accumulating and transfinite, the security is higher.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all alterations and/or modifications that fall within the scope of the invention, and that are intended to be included within the scope of the invention.
Claims (7)
1. A hydraulic directional roof cutting apparatus, comprising:
the liquid pipe is provided with a liquid inlet pipe,
a joint arranged at the downstream end of the liquid pipe in a communicating way,
a nozzle arranged on the joint in a communicating way,
a sleeve sleeved on the outer side of the liquid pipe,
the liquid pipe is connected with an external high-pressure liquid source and conveys high-pressure liquid to the joint, so that the high-pressure liquid is sprayed out from the nozzle in an oriented mode, the sleeve surrounds the joint and extends towards the downstream end, the tail end of the sleeve is sealed, a communication hole is formed in the side wall of the sleeve and is used for corresponding to the nozzle, the sealed end of the sleeve is fixedly connected with the joint, a clamping piece used for limiting the circumferential position is arranged between the sealed end of the sleeve and the joint, the clamping piece comprises a fixed table which is arranged on the surface of the downstream end of the joint in a protruding mode, a blind hole is formed in the fixed table in a drilling mode, an opening groove which is communicated with the blind hole is formed in the fixed table, a protruding table is arranged in the tail end of the sleeve and inserted into the blind hole, a clamping tooth is arranged at the outer end of the protruding table and is clamped into the opening groove, and a screw sequentially penetrates through the protruding table and the fixed table to fixedly connect the sleeve with the joint.
2. The hydraulic directional roof cutting apparatus according to claim 1, wherein the joint has a reducing section and a straight section provided downstream of the reducing section, and the flow area of the reducing section is gradually reduced in the upstream-to-downstream direction, and the nozzle is provided on the straight section.
3. The hydraulic directional roof cutting apparatus of claim 2, wherein a guide tube is provided on the straight barrel section for communicating the straight barrel section with the nozzle.
4. A hydraulic directional roof cutting apparatus according to claim 3, wherein a plurality of said guide tubes are disposed at intervals in the axial direction, and wherein at least two of said guide tubes are disposed obliquely with respect to the radial direction, said guide tubes disposed obliquely being spaced apart from each other from the upstream end to the downstream end.
5. The hydraulic directional roof cutting apparatus of claim 1, wherein a connector is selectively provided at an upstream end of the sleeve for at least partially surrounding the liquid tube.
6. The hydraulic directional roof cutting apparatus according to any one of claims 1 to 5, further comprising a receiving tub sleeved on the sleeve, the receiving tub opening toward the downstream end.
7. The hydraulic directional roof cutting apparatus of claim 6, wherein the receiving basin has a first cylindrical member surrounding the sleeve and a second bowl member sleeved outside the first cylindrical member, the first cylindrical member and the second bowl member forming an annular receiving channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110639422.3A CN113217099B (en) | 2021-06-08 | 2021-06-08 | Hydraulic directional top plate cutting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110639422.3A CN113217099B (en) | 2021-06-08 | 2021-06-08 | Hydraulic directional top plate cutting device |
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| Publication Number | Publication Date |
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| CN113217099A CN113217099A (en) | 2021-08-06 |
| CN113217099B true CN113217099B (en) | 2024-04-05 |
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| CN202110639422.3A Active CN113217099B (en) | 2021-06-08 | 2021-06-08 | Hydraulic directional top plate cutting device |
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